if you pre ordered, then go whenever you want
it will be there for you. It's being held for you
It just depends on how long of a line you want to wait in, and how early in the day you want your phone. And no one here knows what the line will be like, so its really a shot in the dark in that respect
This is incorrect.
It's already been confirmed that if you used the Apple online tool to preorder; which took down your name, address, device type, plan, and did a credit check via your SSN, then you have only pre-'registered' for your phone.
We don't know exactly how it will work from that point but I believe everyone will line up and either A) the store early only for pre orders with the non preorders waiting until the store opens regular hours or B) the store opens early for everyone, but breaks off into a seperate line for pre-orders which get priority.
Regardless, its first come-first serve basis, so if you pre-'register' on apples website but don't come until 9 that night, you may be SOL if they sell out.
The only true pre order way was through ATT, because they took your payment information and pre authorized your card when you ordered. The phones that ship to the ATT store WILL have your name on it straight from the fulfillment center.
Apple's own pre-order system is a bit too primitive for them to reserve a phone for everyone who signs up, because I went through the order process 3 times (showing different plans to family) which would total three phones, and I doubt apple would ship out and reserve phones especially since they took down NO payment information.